Olimex Support Forum

Microcontrollers => ESP8266 => Topic started by: dcosper on September 06, 2020, 05:27:51 pm

Title: Issues with new esp8266 Rev A
Post by: dcosper on September 06, 2020, 05:27:51 pm
I purchased this just the other day, it is not the dev, it has a small black 10 pin female connector to the unit, firstly, i am a novice so please forgive me, secondly, this component came with 0 information at all, just the item in a small plastic bag, so this means i have to spend quite a bit of time searching the internet attempting to find out what the pin layout is (otherwise how will i connect it?), I did find it eventually, even though all the official documents do not contain that information, i found a UNEXT diagram, it stated that if i turn the item on its side with the UNEXT text pointing upwards, that the pin count would start from 1 on the left hand side, and continue to 10 normally, this means that pin 1 is vcc of 3.3v input, and pin 2 (right next to it) is GND, however, when i hook those up to a power supply (yes 3.3v), the item becomes very hot very fast, and i end up unplugging it because i think i maybe have the polarity reversed or something, any clue what i am doing wrong ?
Title: Re: Issues with new esp8266 Rev A
Post by: olimex on September 08, 2020, 01:21:32 pm
Hi,

Did you check the product page?

https://www.olimex.com/Products/IoT/ESP8266/MOD-WIFI-ESP8266/open-source-hardware

Thanks
Tsvetan
Title: Re: Issues with new esp8266 Rev A
Post by: dcosper on September 08, 2020, 04:38:49 pm
Yes i read every document, nowhere is there a simple diagram stating what the pinout is.

https://ibb.co/wY2ZxvC
Found that diagram while searching google, unsure if it is correct, and unsure why this information is not in the official documents.
Title: Re: Issues with new esp8266 Rev A
Post by: JohnS on September 08, 2020, 11:44:55 pm
Does the wikipedia entry for UEXT not help (as it did me)?

John
Title: Re: Issues with new esp8266 Rev A
Post by: LubOlimex on September 09, 2020, 10:32:29 am
@dcosper The picture is correct. It is from this document: https://www.olimex.com/Products/IoT/_resources/ESP8266EX-how-to-update-firmware.pdf

Edit: if you use MOD-WIFI-ESP8266 notice that it has a female plug connector, while the picture shows a male socket connector. The board has IDC10S, while the picture was made for BH10S.
Title: Re: Issues with new esp8266 Rev A
Post by: dcosper on September 13, 2020, 05:04:40 am
Then we are back to my original complaint, when you hook a 3.3v power supply to this item it becomes super hot, and is unusable, however, it took so long to gather information on this model i just chose to purchase more esp8266 from other companies, thankyou